Intro to Millwright Practice Exam 2025 – Comprehensive All-In-One Guide for Exam Success!

Lock nuts are specifically designed to prevent loosening due to vibration and other forces. Their unique locking mechanism can include nylon insert lock nuts, or those that have specially contoured shapes that grip the bolt thread. To install these nuts properly and ensure their effectiveness, a specific tool, like a socket or a wrench that fits the unique profile, might be necessary. This ensures a secure fit and maintains the integrity of the installation, especially in applications where vibration could cause other types of nuts to come loose.

In contrast, cap nuts, hex nuts, and wing nuts do not typically require specialized tools. Cap nuts can usually be tightened with standard wrenches, hex nuts are among the most common hardware using standard tools, and wing nuts are designed for easy manual installation and removal without any tools. This distinction highlights why lock nuts are set apart by their requirement for special tools due to their locking features.